Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21920306t&link_type=abstract
American Astronomical Society, AAS Meeting #219, #203.06
Astronomy and Astrophysics
Astronomy
Scientific paper
Past investigations have shown a connection between the properties of SN Ia and their host galaxies. We refine these studies using UV through Mid-IR observations of both nearby and distant SN Ia hosts. These observations are based on ultraviolet (GALEX), optical (ESSENCE and CfA3/4), near-IR (PAIRITEL and 2MASS), and mid-IR (WISE) photometry along with optical spectra. We will present new results showing that the properties of SN Ia, both intrinsic and with respect to their use as distance indicators, appear to depend on a combination of metallicity, and star-formation rate of the host. We suggest that the stellar population age and location of the supernova progenitor can play a roll in using SN Ia as precision distance indicators, and advocate that a multi-wavelength approach is one way to disentangle the different influences.
Garnavich Peter
Schmidt Bernhard
Tucker Bradley E.
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